org.apache.hadoop.security.authentication.server

Class MultiMechsAuthenticationHandler

java.lang.Object

org.apache.hadoop.security.authentication.server.MultiMechsAuthenticationHandler

All Implemented Interfaces:

AuthenticationHandler

Direct Known Subclasses:

KerberosAuthHandler

public class MultiMechsAuthenticationHandler
extends Object
implements AuthenticationHandler

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MultiMechsAuthenticationHandler.AuthHandlerEnum

Constructor Summary

Constructors

Constructor and Description
MultiMechsAuthenticationHandler()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addHeader(javax.servlet.http.HttpServletResponse response) Children must override this method with supplying corresponding header
AuthenticationToken	authenticate(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Authenticate main method: In step 1.
void	destroy() Destroys the authentication handler instance.
protected MultiMechsAuthenticationHandler	getAuthBasedEntity(String authorization) Children must override this method to essentially return "this" based on the request header or null if request header is not suitable to a given auth mechanism
String	getType() Returns the authentication type of the authentication handler.
void	init(Properties config) Initializes the authentication handler instance.
boolean	managementOperation(AuthenticationToken token, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Returns true by default.
protected AuthenticationToken	postauthenticate(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) Children must override this method to perform real authentication based on the information received in the request header

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MultiMechsAuthenticationHandler

public MultiMechsAuthenticationHandler()

Method Detail

init

public void init(Properties config)
          throws javax.servlet.ServletException

Description copied from interface: AuthenticationHandler

Initializes the authentication handler instance.

This method is invoked by the AuthenticationFilter.init(javax.servlet.FilterConfig) method.

Specified by:

init in interface AuthenticationHandler

Parameters:

config - configuration properties to initialize the handler.

Throws:

javax.servlet.ServletException - thrown if the handler could not be initialized.

authenticate

public AuthenticationToken authenticate(javax.servlet.http.HttpServletRequest request,
                               javax.servlet.http.HttpServletResponse response)
                                 throws IOException,
                                        AuthenticationException

Authenticate main method: In step 1. it will get headers from all children and return all of them ordered from strongest to weakest In step 2. based on the client choice it will pick authentication mechanism and does authentication based on that one

Specified by:

authenticate in interface AuthenticationHandler

Parameters:

request - the HTTP client request.

response - the HTTP client response.

Returns:

an AuthenticationToken if the HTTP client request has been authenticated, null otherwise (in this case it must take care of the response).

Throws:

IOException - thrown if an IO error occurred.

AuthenticationException - thrown if an Authentication error occurred.

addHeader

protected void addHeader(javax.servlet.http.HttpServletResponse response)

Children must override this method with supplying corresponding header

Parameters:

response -

postauthenticate

protected AuthenticationToken postauthenticate(javax.servlet.http.HttpServletRequest request,
                                   javax.servlet.http.HttpServletResponse response)
                                        throws IOException,
                                               AuthenticationException

Children must override this method to perform real authentication based on the information received in the request header

Parameters:

request -

response -

Returns:

Throws:

IOException

AuthenticationException

destroy

public void destroy()

Description copied from interface: AuthenticationHandler

Destroys the authentication handler instance.

This method is invoked by the AuthenticationFilter.destroy() method.

Specified by:

destroy in interface AuthenticationHandler

getAuthBasedEntity

protected MultiMechsAuthenticationHandler getAuthBasedEntity(String authorization)

Children must override this method to essentially return "this" based on the request header or null if request header is not suitable to a given auth mechanism

Parameters:

authorization -

Returns:

getType

public String getType()

Description copied from interface: AuthenticationHandler

Returns the authentication type of the authentication handler.

This should be a name that uniquely identifies the authentication type. For example 'simple' or 'kerberos'.

Specified by:

getType in interface AuthenticationHandler

Returns:

the authentication type of the authentication handler.

managementOperation

public boolean managementOperation(AuthenticationToken token,
                          javax.servlet.http.HttpServletRequest request,
                          javax.servlet.http.HttpServletResponse response)
                            throws IOException,
                                   AuthenticationException

Returns true by default. Sub classes can override this method if they need to do any operations such as get/renew/cancel delegation tokens.

Specified by:

managementOperation in interface AuthenticationHandler

Parameters:

token - the authentication token if any, otherwise NULL.

request - the HTTP client request.

response - the HTTP client response.

Returns:

TRUE if the request should be processed as a regular request, FALSE otherwise.

Throws:

IOException - thrown if an IO error occurred.

AuthenticationException - thrown if an Authentication error occurred.